CHM2046 – Prof. C.R. Martin Quiz 1 Jan. 25, 2008
NAME: __________________________ Section #:_______________
! SHOW ALL WORK !
1. Write the equilibrium constant expression (K ) for ecch of the following reactions:
a.) 2HCl(g)+ Br (l) ↔ 2HBr(g)+Cl (g) 10 pts
b.) 6NO (g2+ 2H O(g) ↔24HNO (g)+ 2NO(g) 3 10 pts
2. At 700 C, K = 9c30 x 10 for the reaction
2H S2g) ↔ 2H (g) +2S (g) 2
0.0020 moles of each component are added to a 1.0 L flask. Which of the following statements
is true? (Show all work!) (10 pts)
a. The reaction is at equilibrium.
b. The reaction is not at equilibrium and in achieving equilibrium more products are created.
c. The reaction is not at equilibrium and in achieving equilibrium more reactant is created.
= 0.002 M , Similarly for [H ] an2 [S ] = 020020 M
Since Q >cK , tce system is not at equilibrium, and in order to reestablish equilibrium is
has to shift to the left, and thus more reactants will need to be created.
3. At 25 C, K = c.5 x 10 for the reaction N 2g) + 3H (2) 2NH (g3
. . -1. -1
Find K .p(R = 0.082 LAtmmol K ) (20pts)
Δn 8 -2 5
K p K (Rc) K p 3.5 × 10 (0.082 × 298) = 5.86 × 10